KaspichaniaBoats

using System;

    class KaspichaniaBoats
    {
        static void Main()
        {
            int N = int.Parse(Console.ReadLine());
            int sizeBottom = N;
            int width = (N * 2) + 1;
            int height = 6 + ((N - 3) / 2) * 3;
            int heightSails = (2 * height) / 3;
            int heightBottom = height / 3;
            int dotOne = N - 2;

            //first part

            for (int i = 0; i < 2; i++)
            {
                Console.Write(new string('.', N - i));
                Console.Write(new string('*', width - 2 * (N - i)));
                Console.WriteLine(new string('.', N - i));
            }
            for (int i = 0; i < heightSails - 3; i++)
            {
                Console.Write(new string('.', dotOne - i));
                Console.Write('*');
                Console.Write(new string('.', i + 1));
                Console.Write('*');
                Console.Write(new string('.', i + 1));
                Console.Write('*');
                Console.Write(new string('.', dotOne - i));
                Console.WriteLine();
            }
            Console.WriteLine(new string('*', width));

            //second part

            for (int i = 0; i < heightBottom - 1; i++)
            {
                Console.Write(new string('.', i + 1));
                Console.Write('*');
                Console.Write(new string('.', dotOne - i));
                Console.Write('*');
                Console.Write(new string('.', dotOne - i));
                Console.Write('*');
                Console.Write(new string('.', i + 1));
                Console.WriteLine();
            }
            Console.Write(new string('.', (width - N) / 2));
            Console.Write(new string('*', N));
            Console.Write(new string('.', (width - N) / 2));
            Console.WriteLine();
        }
    }